Yorkshire Tea will be served on board when MSC Cruises starts sailing from Southampton next summer.
More than 1,000 people voted for the brew in an online poll via Facebook and twitter.
The European line will also be installing kettles in cabins on MSC Magnifica for passengers to make hot drinks.
Other additions to the 3,200-passenger ship include British and Irish beer and cider on draft, a British comedian and cruise director joining the entertainment team and condiments including HP Sauce, Colman’s mustard and Marmite.
The company is recruiting a tea and cake taster to sail on the ship and ensure that passengers are getting a proper brew, and the cakes are “practically perfect” in every way.
The successful applicant will be invited aboard MSC Magnifica sailing from Southampton in April for a week to taste-test the ship’s tea and cakes as it starts its summer season of ex-UK departures.
MSC Cruises UK managing director Antonio Paradiso, MD of MSC Cruises for the UK & Ireland said: “We are so pleased to announce that the winning brand, selected by the British public, is Yorkshire Tea.
“In order to make a ‘proper brew’ it’s attention to detail that counts, which is something we pride ourselves on at MSC Cruises.
“As a family owned company we understand how important home comforts are, and are pleased to be able to add this special touch in order to make MSC Magnifica home for guests while they are exploring the Mediterranean and Northern Europe in 2018.”
He added: “MSC Cruises is dedicated to the UK market and homeporting a ship in Southampton, and the enhancements we’ve made to the on board product based on feedback from UK guests and travel agents, is testament to this.”